ELC-09D680DF Equivalent & Substitute Parts

Part Overview

The ELC-09D680DF is a 68 µH unshielded wirewound inductor manufactured by Panasonic Electronic Components, rated for 1 A with a DC resistance of 140mOhm. This through-hole radial component operates at a test frequency of 10 kHz and is part of the 09D series. The product is currently obsolete, making identification of functionally equivalent alternatives essential for ongoing design support, maintenance, and production continuity.

Substiute Parts

ELC-09D680DF

Panasonic Electronic ComponentsIn Stock: 1008ELC-09D680DF Datasheet

Current PartRFQ

744731680

Würth ElektronikIn Stock: 984744731680 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the ELC-09D680DF is determined by the following critical parameters:

• Inductance Value: 68 µH (±10% tolerance acceptable)
• Current Rating: Minimum 1 A; higher ratings provide design margin
• DC Resistance: Maximum 200mOhm; values up to this threshold maintain circuit performance
• Mounting Type: Through Hole required for PCB compatibility
• Package / Case: Radial, Vertical Cylinder configuration for footprint compatibility
• Compliance: ROHS3 compliance required for regulatory alignment

The Würth Elektronik 744731680 meets these substitution criteria with equivalent inductance, higher current rating (1.5 A), acceptable DC resistance (200mOhm Max), and identical mounting and package specifications. Both components are ROHS3 compliant and suitable for through-hole assembly.

Parameter Comparison

Engineering Selection Recommendations

The Würth Elektronik 744731680 is a suitable substitute for the obsolete ELC-09D680DF based on the following factors:

• Electrical Equivalence: Both components provide 68 µH inductance with ±10% tolerance. The 744731680 offers higher current rating (1.5 A vs. 1 A), providing additional design margin without compromising circuit function.

• DC Resistance Compatibility: The 744731680 DC resistance of 200mOhm Max is within acceptable limits for applications originally designed for the 140mOhm ELC-09D680DF. The 60mOhm increase represents a 43% rise in resistance; circuit designers must verify this does not exceed thermal or performance requirements.

• Physical Compatibility: Both components use through-hole radial, vertical cylinder packaging. The 744731680 is physically smaller (0.307" Dia vs. 0.374" Dia; 0.295" Height vs. 0.350" Height), ensuring PCB footprint compatibility with no layout modifications required.

• Regulatory Compliance: Both components are ROHS3 compliant, meeting current environmental and regulatory standards.

• Product Status: The 744731680 is active and in production, ensuring long-term availability and supply chain stability compared to the obsolete ELC-09D680DF.

Frequently Asked Questions (FAQ)

Q: Can the Würth Elektronik 744731680 be used as a direct replacement for the ELC-09D680DF?

A: Yes, the 744731680 is electrically and mechanically compatible. Both components provide 68 µH inductance with ±10% tolerance and use identical through-hole radial, vertical cylinder packaging. The 744731680 is physically smaller and offers higher current rating, making it suitable for direct substitution.

Q: What is the impact of the increased DC resistance (200mOhm vs. 140mOhm)?

A: The 744731680 has 60mOhm higher DC resistance. In applications where the inductor carries continuous current, this results in proportionally higher resistive losses and heat generation. Circuit designers must verify that the thermal budget and performance specifications of the original design remain acceptable with this resistance increase.

Q: Are there any shielding differences between these components?

A: Yes. The ELC-09D680DF is unshielded, while the 744731680 is shielded with a ferrite drum core. Shielding reduces electromagnetic interference (EMI) emissions and susceptibility, which may benefit circuit performance. However, shielding can affect inductor behavior in certain high-frequency applications; circuit validation is recommended if EMI performance is critical.

Q: Will the smaller physical size of the 744731680 affect PCB layout?

A: No. The 744731680 is smaller than the ELC-09D680DF and will fit within the original footprint without layout modifications. The smaller size may provide additional PCB routing flexibility.

Q: Are both components RoHS compliant?

A: Yes. Both the ELC-09D680DF and 744731680 are ROHS3 compliant, meeting current environmental and regulatory requirements for electronic components.

Q: What is the availability status of these components?

A: The ELC-09D680DF is obsolete and no longer in production. The 744731680 is active and in production, ensuring reliable long